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Posted by ingoruberg on Sun, 13 Oct 2019 21:15:57 -0700
I. Introduction of Lodash:
Lodash is a set of tool library, which encapsulates many processing functions for common data types, such as strings, arrays, objects and so on, to help developers reduce the difficulty of using JS.
Introduction to Lodash:
Take Vue-cli as an example:
1,yarn install lodash2. Introduce and use in main.js
import _ from ' ...
Posted by rob_maguire on Mon, 14 Oct 2019 01:20:59 -0700
For the application scenario of "nearby people" in the field of location-based services, many spatial indexes such as PG, MySQL and Mongo DB can be used to implement it. Redis, which combines its ordered queue zset and geohash coding, achieves the function of spatial search and has a very high operational efficiency. This pap ...
Posted by reidme on Mon, 14 Oct 2019 03:14:34 -0700
Following up the following article: Backup database for introduction to MySQL database
Installation environment instructions
[root@~]# cat /etc/redhat-release
CentOS release 6.5 (Final)
[root@~]# uname -r
Because it is a simulated environment, the master and slave libraries are on the same se ...
Posted by likethegoddess on Sun, 13 Oct 2019 20:22:25 -0700
case multi-branch statement
The structure of case statement:
Execute different command lines for different values of variables
case variable value in
Command Sequence 1
Command Sequence 2
Default command sequence
Character type recognition:
Prompt the user to enter a character ...
Posted by merrydown on Sun, 13 Oct 2019 18:14:14 -0700